POINT TO POINT: AN ALTERNATIVE METHOD FOR EXTRACTING “HOMOLOGOUS POINTS” IN BATHYMETRIC DATA COLLECTED WITH A MULTIBEAM SYSTEM

Due to waterway transport efficiency, mainly for commercial trades, the use of sea/river routes has grown recently. So, importance producing high quality nautical charts stands out. A chart is hydrographic survey final product and its accuracy depends on data collected, primarily vertical (depth). In this sense, despite theoretical practical difficulty in obtaining homologous points surveys, even when performing check lines, bathymetric must always be delivered with a statistically proven confidence level. Thus, study two main objectives: i) propose method, called Point (P2P), “homologous points” surveys carried out multibeam systems, without resorting mathematical and/or statistical interpolations, (P2P); ii) quantify magnitude difference between evaluation using lines (CL) by overlapping successive sounding (SL), applying P2P method. The results showed that easy application, provide low computation effort, robust consistent. Besides that, was possible applied regular get validation survey.